Using Area Constraints

Area constraints are a way of restricting where PAR can place a particular piece of logic. By reducing PAR's search area for placing logic, PAR's performance can be improved.

To create an area constraint, do the following steps.

1. Select a hierarchical group in the Design Hierarchy window.
   
   
2. Select Floorplan Assign Area Constraint or click on the toolbar button.
   
   
3. In the Floorplan window, use the mouse to drag out a rectangular box where you want the area constraint to be located. The area constraint will cover all the tiles that are inside the drag box.
   
   

Area constraints may overlap each other. Select Floorplan Bring Area To Front or Floorplan Push Area To Back to move a selected area constraint in front of or behind another.